Oil-burner boiler



8 1927. March L. SCOTT OIL BURNER BOILER.

Filed Feb. 4;. 1925 2 Sheets-Sheet 1 AL; 'ATTORNEYJY a ch L. scoTT OILBURNER BOILER 2 Sheets-Sheet 2 Filed Feb. 4, 1925 travel, means LEWIS L.SQO'IT, OF ST. LOUIS, MISSOURI.

OIL-BURNER BOILER.

Application filed February This invention relates to improvements in hotwater or steam boilers and particularly. to boilers of that typeprovided with an oil burning equipment.

An object of the invention is to provide a boiler of compact arrangementwhile, at the same time, obtaining a maximum travel ofthe products ofcombustion along paths or channels where it will contact with the wallsof the water containing portions of the boiler.

A further object is to secure a uniform heating of the water throughoutthe boiler, this being. accomplished by the provision of a plurality ofducts through which uniform quantities of the products of combustionbeing provided for securing a uniform distribution of said products tothe several ducts or fiues, regardless of the varying distances betweenthe several fiues and the stack or discharge outlet for the products ofcombustion.

With these and other objects in view, the invention consists in certainnovel details and combinations of parts, all as will hereinatter be morefully described and the novel features thereof particularly pointedoutin the appended claims.

In the accompanying drawings,

Figure 1 is a vertical sectional view of a boiler embodying the presentimprovements.

Fig. 2 is a transverse sectional view on the I line 2-2 of Fig. 1.

Fig. 3 is a similar view on the line 3-3 of Fig. l.

The present construction preferably embodies an oil burner torhcatingthe water, this oil burner equipment comprising a motor l for operatingaituel pump 2 and a blower wheel that is enclosed in the casing 3. Fuelis brought trom any source by the pump 2through the pipe 4 and isdischarged by said pump through a pipe 5 to the fuel s ray nozzle 6located. within the boiler.

uei sprayed from nozzle 6 is ignited by the spark plug 7 and air fromthe air blower 3 is' conducted into the air receiver 8 where it is mixedwith the fuel from nozzle 6. The nozzle and spark plug are located atthe top of the boiler and the entire mixture after being i nited isconducted downwardly through a ame director 9 into the main portion otthe combustion chamber 10 which is netcrably cylindrical in crosssection.

I the present instance the boiler com- 4, 1925. Serial No. 6,910.

prises inner and outer shells 11, 20, the space between the two shellsconstitutin the water space or boiler and the space wit in the innershell 11 constituting the combustion chamber. lhe bottom portion of theboiler is formed by a base casting 17 having an em space therein above awater space 16, the partition between the airspace and water spaceconstituting the bottom wall of the combustion chamber 10. Water issupplied to the boiler through a pipe 26, in which there is a pressurecontrol or reducing valve such as disclosed in prior U. S. Patent No.1,353,844., the water being supplied from said pipe to the bottom waterspace 16 from whence it can flow to the water space 18 between the twoshells by way of a series of supplies, such as indicated at 21.Preferably, the boiler is made up of three sections, the base section17, an intermediate section, and a top section, the water space betweenthe two shells in the two upper sections being substantially continuousby reason of the provision of aseries of nipples 25 at the junction ofthe two upper'sections. Steam or water is taken on from the'upper end ofthe water space 18 through the outlet pipe 33 and the return pipeopening, indicated at 32, is located in the base section 17. With astructure as thus far described,

the downward travel of the burning mixture along the inner shell 11 willresult in raismg the temperature of the water in space 18 to thetemperature desired and it will be noted that the partially cooled gaseswill impinge upon the bottom of the combustion chamber and efi'ect arise in the temperature of therelativcly cold, freshly supplied water inthe base section.

To further guard against the loss of any of the heat units, however,there is provided a series of fines for carr ing ed the products ofcombustion, these use extending upwardly from the airspace in the basesection through the water space 18 in the two u per sections. Each ofsaid fines is locate entirely within said water space 18 and is totallysurrounded, throughout its length b water in said space, so thatpractically all the heat of the productsoii combustion is utilized inheatingthc water.

Preferably saidflues are arranged around the boiler in pairs, therebeing three pairs 36, 36 and 36 in the present instance and the dues ofeach pair are connected to a stack or discharge opening 37 for the prodlltlh ill lEi

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note of combustion. As the gases passing through the two fines 36farthest from stack 37 contact with a larger heat absorbing area andtravel a longer and more tortuous path than those passing through lines36 nearest said stack, it is apparent that in the absence of any reblatmg means there will be an uneven distribution of gases through theseveral sets of tube, larger quantities of gases passing through fines36 than through he others. For this reason, means are provided forsecuring a uniform distribution of the roducts of combustion flowingthrough the dues from the bottom of the combustion chamber. While thismight be accomplished in other ways, the preferred construction is toraduate the openings between the fines and stack, the fines 36 nearestthe stack communicating therewith through a relatively narrow opening 39atthe end of space 33 to which fines 36 connect; fines 36 farthest fromthe stack communicating therewith through a relatively large opening 42at the end of the space into which those fines merge; and theintermediate lines 36 communicating with said stack through a space 40and opening 41 which is of a sure substantially the mean of openings 39and 4:2. This is the referred arrangement where three sets of ues arepresent but it will be understood that the openings through which theintermediate fines connect with the stack will be graduated inaccordance with the number of dues used.

' A. boiler oil this construction operates very eficiently but ininstances where it is desired to provide hot water in the top of theboiler in a very short period of time a wa ter coil 12 is arranged inthe combustion chamber 10. The coil is supported in chamber 10 b spacerssuch as 13 in order that the pro nets of combustion will impinge againstthe wall of the water space as well as against the coil and the ends ofsaid coil are connected to the lower water chamber 16 as at 15 and tothe upper end of the main water space as at 14:.

As safety elementsthe boiler is provided at its up or end with a gageand at its lower on with a reliet valve 29 by a pipe 30., This valve isconnected bya pipe 31 to a sewer. lln the base section there is also asmall passageway or duct 35 through which unburned fuel is conducted tothe exterior of the boiler. These last two elements form no art of thepresent invention and need not he further described here. (They arefully described in my prior patent hereinbefore referred to.)

This arrangement, provides a boiler in which is embodied what iscommonly known as the contra-flow principle, the eatest amount of heatbeing at the top of t e combustion. chamber 10 and after the gases are Tgradually reduced in temperature during neiaeee their downward travel insaid chamber they come in contact with the comparatively cold watersupply in chamber 17, partially heat 1. In a boiler, the combinationwith a shell so havipjg a combustion chamber therein, of a plur ity offines of different lengths communicating with said chamber and with adischarge outlet for the products of combustion, the openings ofcommunication between the flues and said outlet being grad noted in sizeaccording to the length or the due, the opening of the shortest fluebeing smaller as compared with the opening from the longest flue.

2. .ln a beiler, the combination with a shell havin a combustion chambertherein, of a plura ity of dues oi diderent lengths commumcatin with thelower end of said chamber and coding upwardly therefrom to a dischargeoutlet for the products of combustion, and openings of communicationbetween the fines and said outlet being graduated in size according tothe length of the due, the opening from the shortest due being smalleras compared with the opening from the longest flue, whereby the productsof combustion from the combustion chamber fire uniformly distributed tothe several ues.

3. lln a boiler, a combination with a shell having a combustion chambertherein, of a plurality oft fines communicating with said chamber andwith a discharge outlet for the products of combustion, said dues beingof varying length, andmeans for governing the proportionate quantity orvolume of products of combustion passing through the individual finescausing the said products of combustion to be uniformly distributedthrough the several dues regardless of the difierences in the length ofthe respective does.

t, in a boiler, the combination with a shell having a combustion chambertherein, of a, lurahty oil fines communicating with the ower end of saidchamber and leading up-' wardly therefrom to a dischar e outlet for theroducts oil combustion, sa-i dues being oi? ide'rent lengths, and meansfor determining the draft conditions in the individualdues to govern theproportionate volume of products at combustion passing through theindividual lines whereby said products of combustion are uniformlydistributed 'llli through the several flues re rdless of the differencesin the length of t e several flues.

5. In a boiler, the combination with a shell having a combustion chambertherein, of a plurality of flues of different len hs arranged in pairsaround said cham r and wmmunicating with the lower end thereof, eachflue leading to a discharge outlet for the products of combustion, theopening between said outlet and the shortest pan of flues beingcomparatively narrow, the open ing between said outlet and the longestpair of flues being comparatively large, and the opening between theoutlet and the remaining pair of flues bein substantially the mean ofthe width of t e o enings of the other pairs of fines.

6. A boiler comprising a combustion chamber, the wall of whichconstitutes a portion of the surface of a water circulating spacesurrounding the combustion chamber, a connect-ion for supplyin water toa water chamber in the bottom 0 the boiler, said cham-.

ber communicating with said water space and forming the bottom of thecombustion chamber, an outlet connection at the top of i said waterspace, means for initially directpartially spent products of combustionwill ing the products of combustion downwardly in contact with thesurface of the water space and the water chamber in the bottom of thecombustion chamber, whereby the affect the relatlvely cold fresh supplyof water in said bottom water chamber, a plurality of flues extendingfrom the bottom of the products of combustion, said flues surroundingthe combustlon chamber, a connection for supplying water to a waterchamber in the bottom 0 the boiler, said chamber communicating with saidwater space and forming the bottom of the combustion chamber, an outletconnection atthe top'of said water space, means for initially directingthe products of combustion downwardly in contact with the surface of thewater space and the water chamber in the bottom of the combustionchamber, whereby the artially spent roducts of combustion wi affeet therelatively cold fresh supplyof water in said bottom water chamber, aplurality of flues extendin from the bottom of the, combustion cham rupwardly throu h the water space to adischarge opening or the. productof combustion, said flues being of varying lengths and the several flueshavin graduated outlets communicating with said discharge opening foruniformly discharging the products of combustion flowing from the bottomof the combustion chamber to the indivi a fines LEWIS L $00

